Initial microbial degradation of polycyclic aromatic hydrocarbons

Milić, Jelena; Avdalović, Jelena; Knudsen, Tatjana Šolević; Gojgić-Cvijović, Gordana; Jednak, Tanja; Vrvic, M Miroslav

doi:10.2298/ciceq150606043m

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…The 2,6‐DCPIP assay tracks color changes from the deep blue oxidized form to the colorless reduced form. This test has been effectively applied to isolate indigenous oil‐degrading microorganisms that can degrade PAHs in crude oil‐contaminated soil (Bidoia et al, 2010; Hanson et al, 1993; Hara et al, 2013; Milic et al, 2016). Thenmozhi et al (2012) used the 2,6‐DCPIP assay to estimate the PAH degradation capacities of Bacillus, Pseudomonas, and Serratia isolated from PAH‐contaminated soil.…”

Section: Resultsmentioning

confidence: 99%

Effects of physicochemical factors on PAH degradation by Planomicrobium alkanoclasticum

Al‐Dossary

Abood

Al‐Saad

2021

Remediation Journal

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Polycyclic aromatic hydrocarbons (PAHs) are environmental pollutants that are mutagenic, carcinogenic, and toxic to living organisms. Here, the ability and effectiveness of selected bacteria isolated from an oil-contaminated area in biodegrading PAHs were evaluated, and the optimal conditions conducive to bacterial PAH biodegradation were determined. Of six bacterial isolates identified based on their 16S rRNA sequences, Planomicrobium alkanoclasticum could subsist on and consume nearly all hydrocarbons according to the 2,6-dichlorophenolindophenol assay. The efficacy of this isolate at PAH biodegradation was then empirically confirmed. After 30 days of incubation, P. alkanoclasticum degraded 90.8% of the 16 PAH compounds analyzed and fully degraded eight of them. The optimum P. alkanoclasticum growth conditions were 35°C, pH 7.5, and NaNO 3 as the nitrogen source. Under these biostimulant conditions, P. alkanoclasticum degraded 91.4% of the total PAH concentration and completely decomposed seven PAHs after 15 days incubation. Hence, P. alkanoclasticum is an apt candidate for the biodegradation of PAHs and the bioremediation of sites contaminated by them.

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Section: Resultsmentioning

confidence: 99%

Effects of physicochemical factors on PAH degradation by Planomicrobium alkanoclasticum

Al‐Dossary

Abood

Al‐Saad

2021

Remediation Journal

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“…The difference in median concentration of these substances in sediments of SWRPs and lakes increased continuously with the molecular weight of the PAHs where PYR had 34% higher concentrations in sediments of SWRPs than lakes, while BPY had 415% higher concentrations. This is likely due to the high-molecular weight PAH being degraded more slowly than low-molecular weight PAHs [42,43]. Another cause could be that the pathways of PAHs to SWRPs and lakes differ, as the main pathway to SWRPs probably is surface runoff from impervious surfaces, while this is not the case for lakes.…”

Section: Sedimentsmentioning

confidence: 99%

Relationship between Polycyclic Aromatic Hydrocarbons in Sediments and Invertebrates of Natural and Artificial Stormwater Retention Ponds

Stephansen

Arias

Brix

et al. 2020

Water

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Sediments and invertebrates were sampled from 9 stormwater retention ponds (SWRPs) and 11 natural, shallow lakes in Denmark. Samples were analyzed for 13 polycyclic aromatic hydrocarbons (PAHs). The SWRPs received urban and highway runoff from various types of drainage areas and the lakes were located in areas of various land uses. Comparing PAHs in the sediments of the SWRPs and the lakes, it was found that levels of total PAH were similar in the two aquatic systems, with median values of 0.94 and 0.63 mg·(kg·DM)−1 in sediments of SWRPs and lakes, respectively. However, the SWRP sediments tended to have higher concentrations of high-molecular-weight PAHs than the lakes. A similar pattern was seen for PAHs accumulated in invertebrates where the median of total PAH was 2.8 and 2.1 mg·(kg·DM)−1 for SWRPs and lakes, respectively. Principal component analysis on the PAH distribution in the sediments and invertebrates showed that ponds receiving highway runoff clustered with lakes in forests and farmland. The same was the case for some of the ponds receiving runoff from residential areas. Overall, results showed that sediment PAH levels in all SWRPs receiving runoff from highways were similar to the levels found in some of the investigated natural, shallow lakes, as were the sediment PAH levels from some of the residential SWRPs. Furthermore, there was no systematic trend that one type of water body exceeded environmental quality standards (EQS) values more often than others. Together this indicates that at least some SWRPs can sustain an invertebrate ecosystem without the organisms experiencing higher bioaccumulation of PAHs then what is the case in shallow lakes of the same region.

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Biodegradation of Hydrophobic Polycyclic Aromatic Hydrocarbons

Ali

Wang

2021

Environmental and Microbial Biotechnology

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Initial microbial degradation of polycyclic aromatic hydrocarbons

Cited by 9 publications

References 27 publications

Effects of physicochemical factors on PAH degradation by Planomicrobium alkanoclasticum

Effects of physicochemical factors on PAH degradation by Planomicrobium alkanoclasticum

Relationship between Polycyclic Aromatic Hydrocarbons in Sediments and Invertebrates of Natural and Artificial Stormwater Retention Ponds

Biodegradation of Hydrophobic Polycyclic Aromatic Hydrocarbons

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